Hey, thanks for the questions. This isn’t a bug. It’s working as designed, and there are docs for it: Agents Window | Cursor Docs
Quick notes:
Two windows is intentional. Agents Window is the new agent-first UI for running agents in parallel. Editor Window is the classic Cursor or VS Code flow with extensions, terminal, and files. You can keep both open or switch between them.
How to switch: Cmd+Shift+P then Open Agents Window or Open Editor Window. In Agents Window, file search is Cmd+P, and content search is Cmd+Shift+F.
Parallel agents on the same project is the main use case for Agents Window. It also supports Worktrees, where each agent works in an isolated Git checkout, then you can review and merge the results. More here: Worktrees | Cursor Docs
About showing only the current project in the left nav: Agents Window is multi-project by design right now, so there isn’t a single-project view toggle.
Let me know if anything else about the new UI is unclear.